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Erscheinungsjahr
- 2000 (6) (entfernen)
Dokumenttyp
- Monographie/Sammelband (3)
- Preprint (3)
Sprache
- Englisch (6)
Schlagworte
- K-theory (3)
- linking coefficients (2)
- Atiyah-Patodi-Singer theory (1)
- Dirac operators (1)
- Fredholm property (1)
- Pontrjagin duality (1)
- elliptic operators (1)
- elliptic operators in subspaces (1)
- eta invariant (1)
- eta-invariant (1)
Institut
The topological significance of the spectral Atiyah-Patodi-Singer η-invariant is investigated. We show that twice the fractional part of the invariant is computed by the linking pairing in K-theory with the orientation bundle of the manifold. The Pontrjagin duality implies the nondegeneracy of the linking form. An example of a nontrivial fractional part for an even-order operator is presented.